Moving-picture-machine attachment



E. R'. WIN SLOW MOVING PICTURE MACHINE ATTACHMENT Fi1ed0ct 25. 1926 gmentoz Eran 51252011 Fatented Dec.20, 1927.

ELBEB'I. B. WINSLOW, OF GIBBOIl', 'NEBBASKA.

' chine attachment movme-rrcrunn-mcmn ArrAcnmfiNr,

Application filed October 25, 192k. Serial no. 144,999.

I The invention relates to a moving picture machine attachment.

The object of the present invention it to rove the construction of the picture mashown and described in application No. 129,818, filed by me August 17, 1926, more especially the switch mechanism for controlling the light circuit and the motor circuit of the moving picture ma chine and'to provide a simple, practical, and

exceedingly sensitive construction adapted to be readily operated by the breaking'of the picturefilm and capable of simultaneously opening the light circuit and the machine is threaded through,

' which breakage of a film, will circuit to extinguish the machine.

A further object light and stop the of the invention is to provide a. device of this character which,

when a film has been repaired or when a film the machine, may be readily. operated to close the breaks in the light circuit and the motor circuit, and while being exceedingly sensitive and positively operative in the event of the at the same time permit a limited movement of a film engaging elementto prevent operation of the mechanism when there is only a slight loosencss or slack in the film.

With these and other objects in view, the invention consists in-the construction and novel combination and arrangeme'nt'of parts hereinafter fully described, illustrated in the accompanying a portion andminor details of construction, within the scope of the claims, may beresorted to without departing from the spirit or sacrificing any. of the advantages of the invention.

and lower spaced terminals and the position of the film engaging arm of the rockshaft being illustrated in dotted lines.

' Fig. 3 isa similar view showing the verticallyslidable plate at the limit of its upmachine.

drawings and pointed out in the'claims hereto appended, it being understood that various changes in the form, proshaft in a set position,

breaks the curved ward movement for closing the light and motor circuits, the position of the film engagin trated-in dotted lines. I

Fig. .4 is a detailed view of the bottom brace of the attachment.

Fig. 5 is. a detailed perspective view of one of the upper terminals.

Fig. 6 is a detailed view of one of the lower terminals. V

In the accompanying drawings, in which is illustrated the preferred embodiment of the invention, the moving picture machine attachment comprises in its construction a base plate 1 consisting of an oblong piece of suitable material and adapted to be arranged upon a moving picture machine and to be se cured to the same The bolt passes through a suitable aperture 4 in the base plate 1 and through the supporting portion of the moving picture machine and tion arranged in a slot 5' of the brace 3. The brace is suitably secured-to the lower face of the base '1 and is angnlarly bent between its ends to ofiset the slotted portion from the lower face of the base 1 .to provide an intervening space between the base and the slotted portion of the brace for the reception of the supporting portion of the moving picture course be employed for securing the attachment to the moving picture machine.

Any other suitable means may of arm of the rock shaft-being illusby a bolt 2 and a brace 3.

is designed to have its lower por- 6 in which is journalled a horizontal rock shaft 7 provided at its front end with a curved upwardly extending arm 8 carrying a film-engaging roller 9. The roller 9 is mounted on a suitable journal 10 of the arm 8 anditis adapted to bear against the picture film'ffor maintaining the arm and the rock freely on'the-spindle so passes over the roller. When the arm and the roller swin downwardly and partially rotate the rocfi shaft and operate the switch mechanism hereinafter described for simultaneously opening the light circuit of the moving picture machine and the motor circuit thereof for shutand the roller rotatesthat the picture film film ting oil the light and stopping'the machine,

and thereby eifectuall preventing any liability of the picture becoming ignited by the lamp ofthe movingv picture machine because of the breakage of the film and the-11o exposure of the film to the lamp. If desired,

. mounting the fixed an adjustable coiled spring may be employed for coacting with the curved arm of the rock shaft to partially rotate the latter in the event of the breaklng of the film, as

shown and describedm the said application.

The rock shaft 7 is equipped at its rear end with an arm 11 constituting a cam and having rounded faces at its outer end and 'op erating within a cam housing-12 consisting of a piece of sheet metal secured or other suitable fastening devices to a vertically slidable plate 13 and having its upper and lower portions bent at an angle to form horizontal flanges 14 and 15. The cam 11 operates between the upper and lower flanges 14 and 15 and is adapted when the rock shaft is partially rotated in one direction to engage the upper flange. l4 and raise the slidable plate against the action of the coiled springs 16, and when swung in the opposite direction to engage the lower flange 15 for positively moving the slidable plate downwardly in conjunction with the action of the coiled spring 16. The upper and lower horizontal flanges 14: and 15 constitute the. top and bottom walls of the cam housing and fit against the slidable plate 13 and space the vertical portion of the cam housing from the slidable plate to provide an intervening space for the cam 11. VVhen the film is threaded through the moving picture machine thearm 8 is raised and carries the cam 11 into engagewith the upper flange or wall'l l of thehousing and moves the slidable plate 13 upwardly, and when the film either breaks or is exhausted the arm 8 will swing downwardly and carry the cam 11 into engagement with the lower flange 15 and move the. slidable plate downwardly. The coiled springs 16 are connected with the slidable plate and with a fixed base to move the slidable plate downwardly as soon as the slidable plate is released from the means hereinafter described. The fixed supporting plate 17 which is constructed of fiber or other insulating material, is secured adjacent the lower edge to ears or flanges 18 of the base plate 1, but any suitable means may of course be employed for su porting plate upon the base 1. The slidab e non-conducting or insulating plate is provided at o posite sides of its intermediate portion wlth slots 19 through which pass screws 20 constituting binding for motor circuit wires 21.

The screws 20 have smooth portions which the motor-circuit to the device.

are arranged in the slots 19, and reduced pass through the,

threaded portions which fixed supporting plate 17 and which are provided with nuts 22 for securing the wires of threaded portions form shoulders at the inner ends of the smooth portionswhich abut against the fixed supporting plate and preby screws plate 1, and are adapted a spring plate The reduced 11 vent the heads of the binding screws 20 from bar-23 having a central attaching portion and upwardly diverging arms or terminal portions which engage the terminal binding screws and close the motor circuit when the plate 13 is at the limit of its upward movement. The terminal portions of the con ductor bar 23 engage the hea'dsof the terminal bolts or screws 20 and the sliding plate is also provided at its upper edge with a transverse conductor bar 24 consisting of a strip of'suitable conducting'material projetting u wardly beyond the slidable plate 13 and liaving its rojecting portion 25 slightly bevelled and arranged to engage over or in front of a pair of upper terminals 26. The upper terminals 26, which are constructed of suitable conducting material, are approximately U-shaped and straddle the upper edge of the fixed supporting plate 17 and are secured to the same by screws 27 or other suitable fastening devices which form binding posts for the attachment of wires 28 of the light circuit. The front sides of the upper terminals 26 are slightly bevelled at 29to enable the conductor bar to readily slide in front of or over the front sides of the upper terminals and form atight electrical connection between the conductor'bar 24 and" the upper terminals. The upper conductor bar contacts with the upper terminal simultaneously with the closing of the motor circuit by the lower' conductor bar, and the slidable plate 13 is adapted by its upward and downward movement to close andopen these circuits simultaneously. When the slidable plate 13 is moved upwardly by the cam it is held in such raised position by means of a setting catch 30 con sisting of a lever provided intermediate of its ends a suitable pivot 33 consisting ofa screw bolt or similar fastening device. The slidable plate 13 is provided at the pivot 33 with an oblong opening 34 of sufiicient size to permit the necessary vertical movement of the plate 13 without the same coming in contact with the pivot 33. Mounted on the pivot 33 is or washer 35 which is adapted to pressthe plate 13 inwardly toward the fixed supporting plate 17- to create suificient friction to maintain'the u per conductor bar firmly in engagement with inals. e upper arm of the lever constitutingthe settin and side in i res 2 and 3, to provide a shoulder 36 which is carried into engagement with a fixed catch 37 consisting of an approximately L-shaped piece secured to the with an eye 32 which is mounted on the upper ,tei-micatch is reduced at the right wards the fixed the setting lever and at the 1,cas,aac

upper portion pivoted setting of the sliding plate- 13. This will prevent the sliding plate from dropping back and will permit a limited play of the cam between the flanges without actuating the sliding plate. j

In order to trip the setting catch slightly in advance of the engagement of the cam with the lower flange, the rock shaft 7 is' provided with an approximately L-shaped trip arm 39 located adj'acent the cam and arranged to engage the lower arm of the setting lever and move the same against the action of the coiled spring 38 when the rock shaft 7 is partially rotated by the arm 8 and the roller 9 .through either the breaking ofa film or the movement of the for engaging beneath the base plate at oppicture maclnne. The

inner end of the film a. complete showing of the film in the motion cam and the setting lever are arranged to permit a limited movement of the parts to prevent any loosening or slack in the film from operating the device. The lower end of the setting lever 30 is provided with a forwardly projecting pin 43 and the arm 39 is adapted to slide readily over the pin 43, and the arm 39 is of suficient length to permit the necessary sliding movement without becoming disengaged from the lever, also the terminal portion of the L-shaped arm forms a stop and will prevent disengagement of the arm and thesetting lever.

The device is provided with a. removable outer casing 40 which fits over theswitch mechanism and which is provided at opposite sides with depending spring catches 41 site sides thereof. The casing 40 1s provided at the front with an opening 42 receiving the rock shaft and extending to the lower edge of the casing to permit the'latter to be placed over and removed: from-the switch mechanism without contacting with the rock shaft.

,WhatIclaimisz ,f Y

A movin picture machine attachmentcomprising controlled mechanism inaim eluding a rock shaft having means to bear against a film and for rotating the;rock shaft hen the film en aging means 1s released by the filni, switch mechanism having spaced upper and lower contacts arranged i pairs and adapted to be included m the cm cuits of the machine and the lamp thereof,

a vertically movable plate provided with conductor bars adapted to be carried into and out of engagement with the said contacts, and a cam carried by the rock shaft for actuating the sliding plate.

2. A movin picture machine attachment comprising fil m controlled mechanism inclurling a rock shaft having means to against a film and for rotating the rock shaft when the film engaging means is released by the film, switch mechanism having spaced upper and lower. contacts arrange in pairs and adapted tobe included in the bear 4 circuits of the machine and the lamp thercof, a vertically movable plate provided with conductor bars adapted to be carried into and out of engagement tacts, a cam carried by the rock shaft for actuating the sliding plate, setting mechanism for holding the sliding plate in an elevated position, and a. tripping device carried by the rock shaft for releasingthe setting mechanism.

3. A moving picture machine attachment comprising film controlled mechanism including a rock shaft havingmeans to bear against a film and for rotating the; rock the film engaging means is released by the film, switch mechanism having spaced upper and lower contacts arranged in pairs and adapted to be included in the circuits of the machine and the lamp thereof, a verticall movable plate provided with conductor ars adapted tobe carried into and out of engagement with the said contac a cam carried bythe rock shaft for actuating the sliding late, a fixed catch carried by the vertica y movable plate, a pivoted setting lever mounted independently I of the sliding plate and arranged to engage with the fixed catch for supporting the sliding plate in an elevated position, and means carried by the rock shaft-for engaging the setting lever to trip the sliding plate. 4. A movin icture machine attachment comprising fihn controlled mechanism including a rock shaft having meansfto bear againstxa film and for rotating the rock haft hen the film en aging means is released by the film, switc mechanism having spaced upper .and lower contacts arranged in pairs and adapted to be included in the circuits of the machine and the lamp thereof, a verticall movable plate provided with conductor ars adapted to be carried into and out of tacts, a cam carried by the rock. shaft for actuating the slidinglate, a fixed catch with the said con-- engagement with the' said. con

carried bythe vertical y movable plate, a. I

spaced contacts and movable of engagement with the fixed catch to trip the sliding plate.

5. A movin picture machine attachment comprising fil m controlled mechanism ineluding a rock shaft having film contacting means, switch mechanism having spaced contacts adapted to be included in the circuits of the machine and the lamp thereof, a vertically slidable plate having conductor bars arranged to engage the said contacts to close the said circuits and adapted also to be carried out of engagement with the contacts by the downward movement of the sliding plate, a cam housing mounted on the sliding plate, and a cam carried by'thc rock shaft and operating in the housing and arranged to engage the same for actuating the sliding plate.

6. A movin picture machine attachment comprising fil m controlled mechanism including a rock shaft having means for engaging a film, switch mechanism having spaced contacts adapted to be included in the circuits of the machine and the lamp thereof, a vertically sliding plate provided coactmg with the out of and into engagement with the same to close and open the said circuits, coiled springs located at opposite sides of the sliding plateand connected with the same for urging the said plate downwardly, acam carried by the rock shaft, and spaced means mounted'on the sliding plate and located at opposite sides of the cam for coacting therewith, whereby the cam is adapted to move the sliding plate upwardly and downwardly.

7. A moving picture attachment comprising film controlled mechanism including a rock shaft having means for engaging a film, .a fixed insulating plate a"vertically slidable insulating 'plate. provided with slots, terminal'bolts o'peratingin the slots and sewith conductor bars curing the sliding plateto the fixed plate,

upper contacts mounted on the fixed conductor bars carried by the slidable late and arranged to engage the terminal olts and the upper contacts, and means carried by the rock shaft for raising and lowering plate,

- the slidable plate.

able plate and arranged to engage the terminal bolts, an uppenconductor bar carried by the slidable plate at the upper end thereof and arranged to engage with the upper contacts, and means carried by the rock slliaft for raising and lowering the slidable p ate.

9. A moving picture machine attachment comprising film controlled mechanism including a rock shaft and having means for engaging a film, a fixed supporting plate, spaced contacts mounted on the supporting plate at the top thereof, a slidable plate, a conductor bar carried by the slidable'plate and arranged to engage the said contacts, a pivoted setting lever having a pivot mounted on the supporting plate, a spring plate arranged on the pivot-of the lever and engaging the slidin plate and maintainin the conductor bar in tight engagement with the said contacts, means carried by the rock shaft for actuating the sliding plate, and a fixed catch mounted on the slidingplate and arranged to be engaged by the setting lever.

In testimony whereof I have hereunto set my hand. 7

-ELBERT R. WVINSLOYV. 

